Answer (1 of 3): Most people will say 3 satellites. But that is incorrect. The count of satellites will also depend on the resolution and the height of the orbit it is placed in. We will need only 2 satellites which is of very high resolution (think Hubble facing earth) kept at very large distan...
The Solar System's planets, and its most likely dwarf planets, are known to be orbited by at least 219 natural satellites, or moons. At least 19 of them are large enough to be gravitationally rounded; of these, all are covered by a crust of ice except for Earth's Moon and Jupiter's Io. Several of the largest ones are in hydrostatic equilibrium and would therefore be considered …
If you want to always "see" at least one satellite, then they will have to be spaced by no much than that amount. With an orbit radius of $R+h = 7158 \, \mathrm{km}$, the orbit length is about 44975 km, and a bit more than 8 satellites are needed (so, in practice, 9 satellites). Note that the conditions are restrictive.
Mar 24, 2016 · View full document. See Page 1. Question 15 1 out of 1 points In the make-believe planetary system above, what would happen to the orbital period of Sulius if its mass increased? SelectedAnswer: The orbital period would be almost exactly the same. Correct Answer: The orbital period would be almost exactly the same.
24 satellites are required to ensure that at a position fix can be obtained by any user, at any point on earth, at any given time. (A network of 24 satellites ensures that at least four satellites are 'visible' at any point on the earth at all times). Eight satellites are used as spares in case of failure.Jan 2, 2022
The GPS satellites are uniformly distributed in a total of six orbits such that there are four satellites per orbit. This number of satellites and spatial distribution of orbits insures that at least eight satellites can be simultaneously seen at any time from almost anywhere on Earth.
ALMANACSystem: activeSatellitesSelectedHealthyGPS3030GLONASS2222Galileo23233 more rows
Galileo (satellite navigation)StatusInitial servicesCoverageGlobalAccuracy1 metre (public) 1 cm (encrypted)Constellation sizeTotal satellites30 (24 active + 6 spares)13 more rows
And in fact most satellites -- especially the bits of debris -- are too faint to be seen with the unaided eye. But depending on who's counting, several hundred can be spotted with the unaided eye.Mar 18, 2016
Many of the details about this class of satellites remain classified, but it is known that there are several of these overhead at any given time. They have an imaging resolution of 5-6 inches, which means they can see something 5 inches or larger on the ground.
A similar analysis can be performed for the current 20 satellite Glonass constellation. Surprisingly the average number of visible satellites is 8-10 for both constellations, and hence tracking both GPS and Glonass would on average effectively double the number of trackable GNSS satellites.
In total, there are at least 24 operational satellites in the GPS constellation, with 3-5 additional satellites in reserve that can be activated when needed. As of May 2020, GPS.gov confirms there are 29 operational satellites. The satellites circle the Earth two times a day at 20,200 km (12,550 miles) up.Jun 23, 2020
A GNSS, or Global Navigation Satellite System, is a generic name for a group of artificial satellites that send position and timing data from their high orbits. The GPS, or Global Positioning System, is just one of the many different sets of satellites that can provide such data.Jan 14, 2019
30 satellitesHow many satellites will Galileo have? Once the Galileo constellation reaches Full Operational Capability (FOC) it will consist of 30 satellites. The constellation will contain 24 operational satellites and six spares.
35The first BDS-3 satellite was launched on 30 March 2015. On 27 December 2018, BeiDou Navigation Satellite System started providing global services....BeiDou.Accuracy3.6 m (global, public) 2.6 m (Asia Pacific, public) 10 cm (encrypted)Constellation sizeTotal satellites35 (2020)Satellites in orbit3512 more rows
24 satellitesThe GLONASS space segment consists of 24 satellites, in three orbital planes, with eight satellites per plane....Table 4: GLONASS Satellite Constellation.Satellites24 plus 3 sparesOrbital planes3Orbital inclination64.8 degreesOrbit radius19,140 km
Satellites that orbit in a medium (mid) Earth orbit include navigation and specialty satellites, designed to monitor a particular region. Most scientific satellites, including NASA’s Earth Observing System fleet, have a low Earth orbit. One way of classifying orbits is by altitude.
In addition to height, eccentricity and inclination also shape a satellite’s orbit. Eccentricity refers to the shape of the orbit. A satellite with a low eccentricity orbit moves in a near circle around the Earth.
This special, high Earth orbit is called geosynchronous. A satellite in a circular geosynchronous orbit directly over the equator (eccentricity and inclination at zero) will have a geostationary orbit that does not move at all relative to the ground. It is always directly over the same place on the Earth’s surface.
Orbital inclination is the angle between the plane of an orbit and the equator. An orbital inclination of 0° is directly above the equator, 90° crosses right above the pole, and 180° orbits above the equator in the opposite direction of Earth’s spin. (NASA illustration by Robert Simmon.)
Inclination is the angle of the orbit in relation to Earth’s equator. A satellite that orbits directly above the equator has zero inclination . If a satellite orbits from the north pole (geographic, not magnetic) to the south pole, its inclination is 90 degrees. Orbital inclination is the angle between the plane of an orbit and the equator.
A geostationary orbit is extremely valuable for weather monitoring because satellites in this orbit provide a constant view of the same surface area. When you log into your favorite weather web site and look at the satellite view of your hometown, the image you are seeing comes from a satellite in geostationary orbit.
Throughout their lifetime, GOES satellites have to be moved three or four times to keep them in place. NASA’s low Earth orbit satellites adjust their inclination every year or two to maintain a Sun-synchronous orbit. Satellites in a low Earth orbit are also pulled out of their orbit by drag from the atmosphere.
For other asteroid or minor-planet moons, see Minor-planet moon. The Solar System 's planets, and its most likely dwarf planets, are known to be orbited by at least 218 natural satellites, or moons. At least 19 of them are large enough ...
Mercury, the smallest and innermost planet, has no moons, or at least none that can be detected to a diameter of 1.6 km (1.0 mi). For a very short time in 1974, Mercury was thought to have a moon . Venus also has no moons, though reports of a moon around Venus have circulated since the 17th century.
Seven moons are large enough to be in hydrostatic equilibrium, including Titan, the second largest moon in the Solar System. Including these large moons, 24 of Saturn's moons are regular, and traditionally named after Titans or other figures associated with the mythological Saturn.
The retrograde moons are grouped into the Carme, Ananke and Pasiphae groups. Saturn has 82 moons with known orbits; 54 of them have received permanent designations, and 53 of them have been named. Most of them are quite small.
Jupiter has 79 moons with known orbits; 72 of them have received permanent designations, and 57 have been named. Its eight regular moons are grouped into the planet-sized Galilean moons and the far smaller Amalthea group. They are named after lovers of Zeus, the Greek equivalent of Jupiter.
Solar System portal. Star portal. v. t. e. The Solar System 's planets, and its most likely dwarf planets, are known to be orbited by at least 218 natural satellites, or moons. At least 19 of them are large enough to be gravitationally rounded; of these, all are covered by a crust of ice except for Earth's Moon and Io.
Its largest moon Charon, named after the ferryman who took souls across the River Styx, is more than half as large as Pluto itself, and large enough to orbit a point outside Pluto's surface. In effect, each orbits the other, forming a binary system informally referred to as a double-dwarf-planet.